Classifying Matter Review

 Steel 

•  Heterogeneous 

•  Homogeneous 

•  Compound 

• Element

Answer explanation

Steel is a homogeneous material, meaning it has uniform composition and properties throughout.

 Sugar 

•  Homogeneous 

   

•  Heterogeneous 

•  Compound 

• Element

Answer explanation

Sugar is a compound, not an element or homogeneous/heterogeneous mixture.

Tags

NGSS.MS-PS1-1

 Table Salt (NaCl) 

•  Heterogeneous 

•  Homogeneous 

•  Compound 

•  Element 

Answer explanation

Table Salt (NaCl) is a compound because it is composed of two different elements, sodium (Na) and chlorine (Cl), chemically bonded together.

 Coffee 

•  Homogeneous 

•  Heterogeneous 

•  Compound 

• Pure Substance

Answer explanation

Coffee is a Homogeneous mixture as it has a uniform composition throughout.

Milk

•  Heterogeneous 

•  Homogeneous 

•  Element 

•  Compound 

Answer explanation

Milk is a Homogeneous substance, meaning it has uniform composition throughout.

Ice water

•  Homogeneous 

•  Heterogeneous 

•  Element 

•  Compound

Answer explanation

Ice water is a heterogeneous mixture because it consists of two different phases - solid ice and liquid water.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Pure Substances: matter that is always made up of the same combination of atoms.

Elements and compounds can both be considered pure substances.

• True

• False

Answer explanation

The statement is true because pure substances are always made up of the same combination of atoms, which applies to both elements and compounds.

Tags

NGSS.MS-PS1-1

Mixtures: matter that is always made up of the same combination of atoms.

Elements and compounds can both be considered pure substances.

• True

• False

Answer explanation

The correct choice is False because mixtures are not always made up of the same combination of atoms, unlike elements and compounds which are pure substances.

Compounds are two or more substances chemically bonded together.

• True

• False

• Depends on the compound

• Compounds are not chemically bonded together

Answer explanation

Compounds are indeed two or more substances chemically bonded together, making the statement true.

Tags

NGSS.MS-PS1-1

Heterogeneous: A mixture in which the substances that make up the mixture are not evenly mixed.

• True

• False

Answer explanation

The statement is true because in a heterogeneous mixture, the substances are not evenly mixed, leading to visible differences in composition.